Plaster-board



C. W. UTZMAN.

PLASTER BOARD.

APPLICATION FILED Aue.13. 1918.

1,383,249. Patented June 28, 1921.

2 SHEETS-SHEET I.

Mara; I 6, gm

0. w. UT'ZMAN.

PLASTER sump. APPLICATION FILED AUG.13, 1918.

1 83,249. Patented June 28, 1921.

Z SHEETS-SHEET 2.

37 4 g I I I 5/ if 25 37 I UNITED STATES PATENT. OFFICE.

cmmnncn w. UTZMAN, or CHICAGO, ILLINOIS, ASSIGNOR, BY MEsNI: ASSIGNMENTS,

TO UNITED STATES GYPSUM COMPANY, OF CHICAGO,

OF ILLINOIS.

. PLASTER-BOABD.

T 0 all whom it may concern Be it known that I, CLARENCE W. UTZMAN, a citizen of the United States, residing at Chicago,in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Plaster-Board, of which the following is a description. a I

. My invention belongs to that general class of manufactures known as plaster board, and relates particularly to a board made up of a suitable body inclosed with suitable covering I material.

The invention has among its objectsthe production of a board of the kind described that is simple, durable, ornamental, eflicient and satisfactory for use wherever found applicable. It has particularly as an object the production of a board that may be easily applied, but when so applied will present a neat, uniform and finished appearance. Many other objects and advantages of the construction herein shown. and described will be obvious to those skilled in the art from the disclosures herein given. To this end my invention consists in the novel construction, arrangement and combination of parts herein shown and described, and more particularly pointed out in the claims.

In the drawings, wherein like reference characters indicate like or "corresponding parts Figure I is a perspective view of one form I of my board;

Fig. 2' is a perspective view of another form; A

Fig. 3 is a perspective view illustrating another, form; v

Fig. 4 is an enlarged view illustrating, a step in the construction of the board;

r Fig. 5'is ,a similar view illustrating th construction of a slightly modified board;

Fig. 6 is a-view illustrating still another modified form; i Fig. -7 is a perspective view illustrating a step in the applying of the board;

Fig. 8 is a similar view illustrating a preceding step;

Flg. 9 1s a vlew illustrating the finished 'Referring first to Fig. 1,1'and 2 represent cover sheets of fibrous, material, such as Specification in Letters Patent.

Application'filed August is, 1913. seriarm. 249,639.

over which the same is turned being in a forming a straight and perfect edge.

,turned to a sharp edge, as indicated in Fig.

ILLINOIS, A CORPORATION) r v 'Patented June as, 1921.

paper or the equivalent, between which is arranged a body 7, preferably of plaster Paris or the equivalent, which'may be placed upon one sheet in a plastic state, covered with the-other sheet and allowed to harden. The plaster board is ordinarily made in long 6 continuous sheets in a suitable machine, and then out off into the desired lengths, thence placed through a kiln if desired, and shipped as required. "Heretofore in making plaster board of this kind it has been difficult to secureside. edges that will conform to a deslred specification. In the preferred form of board, one of the sheets is turned up at theedges and over the body so as to inclose the edges, protect the material and prevent its crumbling out, as well as to provide a good uniform edge and a pleasing appear- .ance. The covering sheets when of paper are somewhat stiff, and the plastic material plastic condition, the edges frequently turn out to be round or irregular. In my improved board, I prefer to score one sheet, for example the bottom sheet 2, so that the same may be folded to inclose the ed e and provide the desired style of edge. s shown in Fig. 4, I score, cut or indent the sheet 2 at each edge (only one edge being shown in Fig. 4) as at 5 and 6,,so as to'divide the same into the face portion 2, edge portion 3 and overlying portion 4. The desired thickness of the board will of course determine the, distance between 5 and 6. When 'a straight edge is to be formed, as shown in Figs. 1 and 4, the scoring is made uniform at 5 and 6.50

that asthe board passes through the machine in the course of manufacture, parts 3 and 4 may be turned up as shown in Figs. 1 mg? 4,

it is desired to form the edge at an angle,-I vary the scoring as shown in Figs. 5 and 6, as well as illustrated in Fig. 3. Referring to Fig. 5 ,,9 represents the sheet 2 with theedge portion '10 and overlying portion 11,

and 12 and 13 the scoring. It will be noted, however, that the scoring at 13.is deeper than that at 12, theedge at the juncture of the side part 10 and, the overlylng portion 11 being sharper. This permits the sheet .to be 3. In Fig. 6, in which l4'represef1tstheface portion, 15 the edgeportioniand 16;the over'- lying portion the scoring atf17. is deeper than the scoringat18, so that itpermits the forming of an edge as is also shown in Fig.

3. I do not consider it necessary to describe in detail the "manufacture of the board, as thls may vary. I have preferred,'however,

to seure the sheet 1 and part 4 together by using the plaster as a securing means at 7 Obviously glue or any equivalent may be.

employed. Obviously, when a continuous board is constructed as described, while the side edges will be inclosed, the edges at the ends at the cutting off points will not be inclosed but the plaster will be exposed. If it is desired. to inclose these edges, strips 8 may be'secured thereon, the same being of paper, fabric or any equivalent material for the purpose, which. may be secured in place in. any suitable manner. The strips 8 are, of.

course, applied after the board is cut oif. p In Fig. l-the top sheet 1 is shown spaced back at each edge of the board 1 so that the outer side edges of the topsheet are pro'- tected and are not apt to be peeled back. It is frequently desirable,.however, in applying the board to have the cracks at the juncture of the boards as tight as possible,

so far as can be, to conceal the juncture ofadjacent boards so hat whenfthe same is I, painted, decorated or otherwise finished, a

pleasing a pearance will be secured. Re ferring to ig. -2, in which 22 represents a face c ver ing sheet turned as at-23-24 at the edges, 21 represents a covering sheet arranged over the plaster 27 or its equivalent,

be formed as desired as previousl board on the other edge I prefer to have" the same extend a greater distance than the space at the opposite side,so that when .two

boards are placed edge. to edge as illustrated in Fig. 7, the portion, 25 of one 'board will overlie the cover sheet 21 of the ad-' jacent board. As shown in Figs. 7 and.8,- 29 represents studding or the equivalent,

which is'tobe covered by and support the plaster board. One board is applied as shown in Fig. '8, and secured in place by nails 39 or the equivalent. The other board may then be positioned as shown in "Fig.

7 with its edge. abutting the edges of the.

board segured in place. The second board may be fastened to the studding 29 or after trimming. When the board is/ placed in position as shown'in Fig. 7

the extending portion 25- is then trimmed as shown at '28, by means of a sharp were trimmed, as shown in Fig. 9.

, tive appearance.

-made in a predetermine theywill fit tight together,

not easily pass kni e or other, suitable tool, and usually with a straight edge. The trimming point, however, is such that in trimming. 25 a portion of the cover sheet 21 is trimmed.

off adjacent edge 26. In cutting both edges 4 at the same time they will match perfectly,

so that the extending portion of 21 willlie' flat against the face of the adjacent board. Of course, before the extending portlon is secured in place, the portion adjacent 26,

which has been trimmed, is peeled off. The result is that the joining of the two boards is disclosed only .by a line where the parts extending part of 25. remaining, may of course be secured in place by glue, paste, or any In Fig'10, 32, 33, 34 and 31 represent the inclosing material for the body 37, the

same being secured in place by nails 36.0r

the equivalent.- In this case the nail 36 also secures in place a small plate 35 of metal or the equivalent, which .projects beyond the edge of the board. The next board may be secured in placeby'pushing the edge of the board under the plate and forming the juncture of the top sheets of the two boards The equivalent material for the purpose.

as previously described. In this case it will be obvious that no nails whatever or other fastening means will show at the front of the board, all fastening means. being entirely concealed, producing a very attrac- In the board shown n Fig. 3, the edges are at an angle, it being immaterial as to which angle is which. Fig. 3 I have shown by dotted lines how the edges may be inclined in the opposite direction.

When constructed as shown in the full lines, one board will maintain the other in place, giving the same results as the.con-

structionshown in Fig. 10. T t

It will be obvious from the preced ng that the'edges of the boards may be accurately manner, so that when they abut affording a .construction in which a r. w1ll larly he "case where the extending-cover sheet .is. employed. With any through. This is particuof the constructions an attractlve and neat finish is se-.

cured. Obviously, the lends-of the boards maybe covered by the covering 8-,-8 should this be desired, or a strip.8\' be arranged to cover the crapk at the juncture of the two'boards. 'In'this case extremely thin paper maybe employed, or its equivalent, so'that the same is not readily noticed,

l Having thus described, my invention, it is obvious that various immaterial'modifications may be made in the same without departin from the spirit of my invention; hence do not wish to be-nnderstood as limiting myself to the exact form, construction,

arrangement and combination of parts herein shown and described, or uses mentioned,

(see Fig. 9) may Vvhat I claim as new and desire to secure by Letters Patent is 1. A plaster board of the kind described comprising abody of suitable material provided with covering sheets on the faces thereof, one of the covering sheets being scored and thence folded to inclose the side edge and overlying the other face of the board.

2. A plaster board of the kind described including a body of suitable material provided with a covering sheet on one face thereof, said covering sheet being scored adjacent one edge of the body and folded at said scoring to extend over said edge.

8. In a plaster board construction, the combination of a plurality of plaster boards each consisting of a suitable body having a covering sheet of fibrous material arranged on one face thereof and folded to inclose the side edges and overlie a portion of the opposite face of the board, and a second covering sheet arranged on the last mentioned face of the board with one edge of the covering sheet spaced from the edge of the board and the other end extending beyond the edge of the board, said boards being adapted to be placed together in edgewise relation, and the extension portion of the covering sheet of one board adapted to lap over and conceal the adjacent abutting edges of the boards and to overlie that portion of the adjoining board from-which its top covering sheet is spaced.

4. In a plaster )oard construction. the combination of a plurality of plaster boards each consisting of a suitable body, a covering sheet arranged on one face of the body, a second covering sheet arranged on the opposite face of the body with one edge of the covering sheet spaced from one edge of the board and the opposite edge of the covering sheet extending beyond anedge of the board,

said boards being adapted to be placed'in sheet arranged on one face of said body, a.

second covering sheet arranged on said body, a second board having a suitable body with a covering sheet on 'one face thereof, and provided with a second covering sheet arranged on the opposite face of the body and of a length to extend over and overlie one of the cover sheets of the adjacent board, whereby the adjacent edges of the two sheets may be simultaneously trimmed and accurately matched.

6. A nlaster board of the kind described including a body of suitable material, and a covering sheet portion for the body extending over two adjoining angularly related face portions of the board, said covering sheet portion being scored adjacent the meeting edge of the angularly related face portions and folded at said scoring.

In testimony whereof, I have hereunto signed my name in the presence of two sub scribing witnesses.

CLARENCE W. UTZMAN.

'Witnesses:

J oHN IV. HILL, CHARLES I. Conn. 

